Definition of since (the) year one
- That monument has been there since the year one.
: from a definite past time until now
: before the present time : ago
: after a time in the past : subsequently
: at a time in the past after or later than : from the time in the past when
: in view of the fact that : because
: in the period after a specified time in the past : from a specified time in the past
: the period of about 3651/4 solar days required for one revolution of the earth around the sun
: the time required for the apparent sun to return to an arbitrary fixed or moving reference point in the sky
: the time in which a planet completes a revolution about the sun
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